Question

x\(^2\)-x-(5x-5)=0

Answer 1

`x^2 -x-(5x-5)=0`

`<=> x^2 -x-5x+5=0`

`<=> x(x-1) -5(x-1)=0`

`<=>(x-1)(x-5)=0`

\(\Leftrightarrow\left[{}\begin{matrix}x-1=0\\x-5=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=1\\x=5\end{matrix}\right.\)

Vậy \(S=\left\{1;5\right\}\)

Answer 2

`x^2-x-(5x-5)=0`

`<=>x(x-1)-5(x-1)=0`

`<=>(x-1)(x-5)=0`

`<=>x-1=0` hoặc `x-5=0`

`<=>x=1` hoặc `x=5`